Commonly used plastic materials for ROTOMOLDING include:
LDPE - Flexible and tough, easy to process, low strength, excellent chemical resistance.
LLDPE - Even better mechanical properties than LDPE. Higher stiffness, excellent low temperature impact strength and environmental stress-crack resistance.
HDPE - Stiffest of the polyethylenes. It, too, has excellent chemical resistance, environmental stress-crack resistance, easy processability, and low cost.
CROSS-LINKED POLYETHYLENE - Contains an agent which reacts with the material during the molding cycle to form a cross-linked molecule similar to a thermoset. This reaction improves the toughness and environmental stress-crack resistance.
EVA COPOLYMER - Excellent low temperature flexibilty. Available in UV stabilized and FDA approved grades.
NYLON - Excellent tensile strength, stiffness, and impact strength. High heat resistance, so properties are maintained at elevated temperatures. Excellent chemical resistance.
POLYCARBONATE - Excellent mechanical properties including stiffness, tensile strength, and creep resistance. Highest impact strength of all rigid plastics. High heat resistance. Can be molded clear.
POLYESTERS - Rotationally molded thermoplastic polyesters are flexible materials which have excellent impact strength. Especially good resistance to long-term contact with water. Intermediate temperature and chemical resistance. Can be molded to very thin wall thickness.
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